Search results for "Odor"

Sorting of Single Biomolecules based on Fourier Polar Representation of Surface Enhanced Raman Spectra

2016

AbstractSurface enhanced Raman scattering (SERS) spectroscopy becomes increasingly used in biosensors for its capacity to detect and identify single molecules. In practice, a large number of SERS spectra are acquired and reliable ranking methods are thus essential for analysing all these data. Supervised classification strategies, which are the most effective methods, are usually applied but they require pre-determined models or classes. In this work, we propose to sort SERS spectra in unknown groups with an alternative strategy called Fourier polar representation. This non-fitting method based on simple Fourier sine and cosine transforms produces a fast and graphical representation for sor…

Ethyl Hexanoate Transfer Modeling in Carrageenan Matrices for Determination of Diffusion and Partition Properties.

2007

 ; Aroma compound properties in food matrices, such as volatility and diffusivity, have to be determined to understand the effect of composition and structure on aroma release and perception. This work illustrates the use of mass transfer modeling to identify diffusion and partition properties of ethyl hexanoate in water and in carrageenan matrices with various degrees of structure. The comparison of results obtained with a diffusive model to those obtained with a convective model highlights the importance of considering the appropriate transfer mechanism. Modeling of the preliminary experimental steps ensures correct estimation of the conditions for the main aroma release step. The obtaine…

Semantic, Typicality and Odor Representation: A Cross-cultural Study

2005

This study investigated odor-category organization in three cultures by evaluating (i) the relationship between linguistic and perceptual categorization and (ii) the existence of an internal structure of odor categories. In the first experiment, three groups of 30 participants from American, French and Vietnamese cultures performed a sorting task. The first group sorted 40 odorants on the basis of odor similarity, the second group sorted 40 odor names on the basis of name similarity and the last group sorted 40 odor names on the basis of imagined odor similarity. Results showed that odor categorization was based on perceptual or conceptual similarity and was in part independent of word and …

Investigating the cryopreservation of nodal explants of Lithodora rosmarinifolia (Ten.) Johnst., a rare, endemic Mediterranean species

2012

In this study, we investigated the possibility of using the droplet-vitrification technique for cryopreserving nodal segments of in vitro plantlets of the endangered plant species Lithodora rosmarinifolia. Among the three vitrification solutions tested, only solutions B1, containing (w/v) 50 % glycerol and 50 % sucrose, and B3, containing 40 % glycerol and 40 % sucrose, were able to induce cryotolerance in nodal explants, resulting in intermediate survival and recovery after cryopreservation. A three-step vitrification protocol, including an additional dehydration treatment with half-strength vitrification solution for 30 min before the treatment with full-strength vitrification solution, d…

Valutazione di ecotipi siciliani di melone d'inverno coltivati in regime seccagno

2010

The increasing cultivation of hybrid melon cultivars has caused the loss of several Sicilian landraces characterized by a high level of diversity, tolerance to environmental stress, disease resistance, and high quality fruits. Although the majority of hybrid melon fields in the Sicilian countryside are nowadays irrigated, many farmers are still growing melon landraces without irrigation. In this trial, eight Sicilian landraces of winter melon (Cucumis melo L. var. inodorus Naud.) with yellow skin and three with white skin were compared with the commercial cultivar Helios. Plants were grown at a density of 2080 plants ha-1. without irrigation. ‘Locale di Ustica’ and ‘Giallo di Recattivo’ gav…

Se cumple un año de la partida de José Vidal Beneyto

2011

On Thinking the Tragic with Adorno

2016

This article seeks to provide a template for understanding the tragic dimension of Theodor W. Adorno’s philosophy through a reading of his early collaborative work with Max Horkheimer, the Dialectic of Enlightenment (1944). While Adorno’s view has often been considered to be tragic, little has been done to reconstruct the tragic dimension of his thought. I argue that the view of the human condition, presented in the Dialectic of Enlightenment, is founded on metaphysical, epistemological, and ethical convictions that have structural similarities with the positions held by theorists and philosophers of tragedy and the tragic. Since traces of these tragic elements can be found throughout Adorn…

Days of the Cavemen? : Adorno, Spengler, and the Anatomy of Caesarism

2021

Abstract This article addresses the controversial question of Theodor W. Adorno’s debt to right-wing Zivilisationskritik by a close reading of his essay “Spengler after the Decline” (1950). The article shows that despite Adorno’s harsh polemics against Oswald Spengler’s Decline of the West (1918, 1922), he sought to make Spengler’s analysis of Weimar Germany’s undemocratic tendencies—“Caesarism”—serve progressive ends. However, Adorno’s essay was not just an effort at “coming to terms with the past” in Adenauerian West Germany. Reading the essay’s original 1941 version together with Adorno’s correspondence with Max Horkheimer sheds light on Spengler as an overlooked key (next to Max Weber, …

Impact of structural features of odorant molecules on their retention/release behaviours in dairy and pectin gels

2014

International audience; Reducing of fat content in food requires a reformulation that may cause a different perception of aroma. Maintaining an adequate level of acceptability of these reformulated products for consumers requires a better understanding of the mechanisms that control the retention of odorant molecules in food matrices. Although pectins are commonly employed as thickeners, their effect on the retention of odorant molecules in nonhomogeneous products has been examined more frequently than their effect on the retention of odorant molecules in simple gels models.The purpose of this study was to explore and compare the respective effects of pectin in simple model systems. The rel…

Selection of Debaryomyces hansenii isolates as starters in meat products based on phenotypic virulence factors, tolerance to abiotic stress condition…

2021

Debaryomyces hansenii is a yeast widely used in meat fermentations as starter for the purpose of improving the aromatic quality of the final product. However, it has not been the subject of an extensive study regarding phenotypic characteristics important for starter selection, such as the capacity to grow at abiotic stress conditions occurring during fermentation, the ability to generate desirable aromas and the absence of virulence traits in yeasts.